Senate Pushes Bill to End Iran Conflict as Cassidy Flips After Primary Loss

May 21 2026

WASHINGTON — The Senate just took a bold step, advancing a bill that could force President Trump to pull U.S. troops out of the Iran conflict, which has dragged on for over two months. In a surprising twist, Louisiana Senator Bill Cassidy, fresh off a primary loss where Trump backed his opponent, flipped his support to join the dissenting Republicans.

The vote tally of 50-47 reveals a fracture within the GOP as more members challenge Trump’s authority on this contentious issue. Cassidy’s switch is particularly notable; he had previously aligned with Trump but now stands with those advocating for congressional approval before any military action. Three Republicans were absent during the vote, and their absence could tip the scales against the measure if they maintain their current stance.

“Republicans are starting to crack, and momentum is building to check him,” declared Senate Democratic leader Chuck Schumer post-vote. The unease among Republicans is palpable, especially as the conflict shows no signs of resolution and gas prices continue to rise.

Senators Rand Paul, Susan Collins, and Lisa Murkowski have consistently supported similar resolutions, and Cassidy joined them for the first time. Meanwhile, Senator John Fetterman stood alone as the only Democrat voting against the bill.

After his electoral defeat, Cassidy returned to Washington with a renewed sense of purpose. He expressed pride in his constitutional duties and hinted at a more independent approach to future votes regarding Trump’s agenda.

Trump’s grip on Senate Republicans appears to be loosening, especially after endorsing a primary challenger against Senator John Cornyn. “While I support efforts to dismantle Iran’s nuclear ambitions, the administration has kept Congress in the dark about Operation Epic Fury,” Cassidy stated on social media. “Without clarity from the White House, no authorization can be justified.”

Meanwhile, the House is gearing up for a similar vote on war powers, with Democrats optimistic about their chances after a recent tie vote on another resolution. Even if Congress manages to pass legislation demanding Trump withdraw from Iran, compliance remains uncertain. The White House has claimed that hostilities have ceased due to a ceasefire, sidestepping the War Powers Resolution of 1973.

This week, Trump revealed he had ordered preparations for an attack on Iran but called it off to allow Gulf allies more time for negotiations. “Peace talks are stalled, and prices at the grocery store and gas station keep climbing,” lamented Democratic Senator Chris Murphy during a floor speech.

On Capitol Hill, frustration is mounting over a war initiated without congressional consent. Republican Senator Mike Rounds expressed support for Trump’s military actions but acknowledged growing concerns among GOP members about a long-term strategy. “It’s not the right time for debate,” he said, “but many feel it’s time to discuss our options.”

Earlier this year, Republican senators pushed for a war powers resolution regarding Venezuela, compelling the administration to justify its military actions. A few GOP senators even forced a final vote on withdrawing from that conflict. However, Senators Todd Young and Josh Hawley ultimately reversed their positions after Secretary of State Marco Rubio agreed to hold a public hearing on Venezuela strategy.

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